Seedling problem faint yellow brown spots, help!

My plant is a week old and just yesterday I noticed these yellow faint spots. I also notice these little bugs I think they're thips but not sure. But I need to fix this problem before it gets worse, are the spots coming from the bugs,over watering, under watering,stress, heat, etc. my water is filtered threw a filter in my fridge or I use bottle water but i boil it the let it sit. But help I don't want my plants to die so soon